The dynamics of unsteady detonation in ozone

Conference · Tue Jan 01 04:00:00 EST 2008

DOI:https://doi.org/10.2514/6.2009-632· OSTI ID:956673

Aslam, Tariq D ^[1]; Powers, Joseph M ^[1]

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1. Los Alamos National Laboratory

An ultra-fine, sub-micron discrete grid is used to capture the unsteady dynamics of a one-dimensional detonation in an inviscid O - O{sub 2} - O{sub 3} mixture. The ultra-fine grid is necessary to capture the length scales revealed by a complementary analysis of the steady detonation wave structure. For the unsteady calculations, shock-fitting coupled with a high order spatio-temporal discretization scheme combine to render numerical corruption negligible. As a result, mathematically verified solutions for a mixture initially of all O{sub 3} at one atmosphere and 298.15 K have been obtained; the solutions are converging at a rate much faster than the sub-first order convergence rate of all shock-capturing schemes. Additionally, the model has been validated against limited experimental data. Transient calculations show that strongly overdriven waves are stable and moderately overdriven waves unstable. New limit cycle behavior is revealed, and the first high resolution bifurcation diagram for etonation with detailed kinetics is found.

• Research Organization: Los Alamos National Laboratory (LANL)
• Sponsoring Organization: DOE
• DOE Contract Number: AC52-06NA25396
• OSTI ID: 956673
• Report Number(s): LA-UR-08-08042; LA-UR-08-8042
• Country of Publication: United States
• Language: English

Related Subjects

45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
BEHAVIOR
BIFURCATION
CAPTURE
CONVERGENCE
DETONATION WAVES
DIAGRAMS
DYNAMICS
EXPLOSIONS
GRIDS
KINETICS
LENGTH
LIMIT CYCLE
OZONE
RESOLUTION